diff options
Diffstat (limited to 'packages/linux/ixp4xx-kernel/2.6.15/40-rtc-class.patch')
| -rw-r--r-- | packages/linux/ixp4xx-kernel/2.6.15/40-rtc-class.patch | 664 |
1 files changed, 538 insertions, 126 deletions
diff --git a/packages/linux/ixp4xx-kernel/2.6.15/40-rtc-class.patch b/packages/linux/ixp4xx-kernel/2.6.15/40-rtc-class.patch index e10998f8d2..3b36813564 100644 --- a/packages/linux/ixp4xx-kernel/2.6.15/40-rtc-class.patch +++ b/packages/linux/ixp4xx-kernel/2.6.15/40-rtc-class.patch @@ -1,6 +1,6 @@ ---- linux-nslu2.orig/include/linux/rtc.h 2006-01-08 18:54:58.000000000 +0100 -+++ linux-nslu2/include/linux/rtc.h 2006-01-08 18:55:19.000000000 +0100 -@@ -91,8 +91,81 @@ struct rtc_pll_info { +--- linux-nslu2.orig/include/linux/rtc.h 2006-01-20 12:04:18.000000000 +0100 ++++ linux-nslu2/include/linux/rtc.h 2006-01-20 20:23:24.000000000 +0100 +@@ -91,8 +91,91 @@ struct rtc_pll_info { #define RTC_PLL_GET _IOR('p', 0x11, struct rtc_pll_info) /* Get PLL correction */ #define RTC_PLL_SET _IOW('p', 0x12, struct rtc_pll_info) /* Set PLL correction */ @@ -64,7 +64,6 @@ +extern void rtc_device_unregister(struct rtc_device *rdev); +extern int rtc_interface_register(struct class_interface *intf); + -+ +extern int rtc_month_days(unsigned int month, unsigned int year); +extern int rtc_valid_tm(struct rtc_time *tm); +extern int rtc_tm_to_time(struct rtc_time *tm, unsigned long *time); @@ -79,11 +78,22 @@ +extern void rtc_update_irq(struct class_device *class_dev, + unsigned long num, unsigned long events); + ++extern struct class_device *rtc_open(char *name); ++extern void rtc_close(struct class_device *class_dev); ++extern int rtc_irq_register(struct class_device *class_dev, ++ struct rtc_task *task); ++extern void rtc_irq_unregister(struct class_device *class_dev, ++ struct rtc_task *task); ++extern int rtc_irq_set_state(struct class_device *class_dev, ++ struct rtc_task *task, int enabled); ++extern int rtc_irq_set_freq(struct class_device *class_dev, ++ struct rtc_task *task, int freq); ++ typedef struct rtc_task { void (*func)(void *private_data); void *private_data; ---- linux-nslu2.orig/drivers/Kconfig 2006-01-08 18:54:58.000000000 +0100 -+++ linux-nslu2/drivers/Kconfig 2006-01-08 18:55:19.000000000 +0100 +--- linux-nslu2.orig/drivers/Kconfig 2006-01-20 12:04:18.000000000 +0100 ++++ linux-nslu2/drivers/Kconfig 2006-01-20 20:23:24.000000000 +0100 @@ -66,4 +66,6 @@ source "drivers/infiniband/Kconfig" source "drivers/sn/Kconfig" @@ -91,8 +101,8 @@ +source "drivers/rtc/Kconfig" + endmenu ---- linux-nslu2.orig/drivers/Makefile 2006-01-08 18:54:58.000000000 +0100 -+++ linux-nslu2/drivers/Makefile 2006-01-08 18:55:19.000000000 +0100 +--- linux-nslu2.orig/drivers/Makefile 2006-01-20 12:04:18.000000000 +0100 ++++ linux-nslu2/drivers/Makefile 2006-01-20 20:23:24.000000000 +0100 @@ -54,6 +54,7 @@ obj-$(CONFIG_USB_GADGET) += usb/gadget/ obj-$(CONFIG_GAMEPORT) += input/gameport/ obj-$(CONFIG_INPUT) += input/ @@ -102,7 +112,7 @@ obj-$(CONFIG_W1) += w1/ obj-$(CONFIG_HWMON) += hwmon/ --- /dev/null 1970-01-01 00:00:00.000000000 +0000 -+++ linux-nslu2/drivers/rtc/class.c 2006-01-08 18:55:19.000000000 +0100 ++++ linux-nslu2/drivers/rtc/class.c 2006-01-20 20:23:24.000000000 +0100 @@ -0,0 +1,143 @@ +/* + * RTC subsystem, base class @@ -248,8 +258,8 @@ +MODULE_DESCRIPTION("RTC class support"); +MODULE_LICENSE("GPL"); --- /dev/null 1970-01-01 00:00:00.000000000 +0000 -+++ linux-nslu2/drivers/rtc/Kconfig 2006-01-09 04:17:02.000000000 +0100 -@@ -0,0 +1,93 @@ ++++ linux-nslu2/drivers/rtc/Kconfig 2006-01-20 21:26:12.000000000 +0100 +@@ -0,0 +1,121 @@ +# +# RTC class/drivers configuration +# @@ -268,6 +278,23 @@ + This driver can also be built as a module. If so, the module + will be called rtc-class. + ++config RTC_HCTOSYS ++ bool "Set system time from RTC on startup" ++ depends on RTC_CLASS = y ++ default y ++ help ++ If you say yes here, the system time will be set using ++ the value read from the specified RTC device. This is useful ++ in order to avoid unnecessary fschk runs. ++ ++config RTC_HCTOSYS_DEVICE ++ string "The RTC to read the time from" ++ depends on RTC_HCTOSYS = y ++ default "rtc0" ++ help ++ The RTC device that will be used as the source for ++ the system time, usually rtc0. ++ +comment "RTC interfaces" + depends on RTC_CLASS + @@ -327,6 +354,17 @@ + This driver can also be built as a module. If so, the module + will be called rtc-ds1672. + ++config RTC_DRV_PCF8563 ++ tristate "Philips PCF8563/Epson RTC8564" ++ depends on RTC_CLASS && I2C ++ help ++ If you say yes here you get support for the ++ Philips PCF8563 RTC chip. The Epson RTC8564 ++ should work as well. ++ ++ This driver can also be built as a module. If so, the module ++ will be called rtc-pcf8563. ++ +config RTC_DRV_TEST + tristate "Test driver/device" + depends on RTC_CLASS @@ -344,13 +382,14 @@ + +endmenu --- /dev/null 1970-01-01 00:00:00.000000000 +0000 -+++ linux-nslu2/drivers/rtc/Makefile 2006-01-09 04:17:02.000000000 +0100 -@@ -0,0 +1,15 @@ ++++ linux-nslu2/drivers/rtc/Makefile 2006-01-20 21:26:12.000000000 +0100 +@@ -0,0 +1,17 @@ +# +# Makefile for RTC class/drivers. +# + +obj-y += utils.o ++obj-$(CONFIG_RTC_HCTOSYS) += hctosys.o +obj-$(CONFIG_RTC_CLASS) += rtc-core.o +rtc-core-y := class.o interface.o +obj-$(CONFIG_RTC_INTF_SYSFS) += rtc-sysfs.o @@ -360,9 +399,10 @@ +obj-$(CONFIG_RTC_DRV_X1205) += rtc-x1205.o +obj-$(CONFIG_RTC_DRV_TEST) += rtc-test.o +obj-$(CONFIG_RTC_DRV_DS1672) += rtc-ds1672.o ++obj-$(CONFIG_RTC_DRV_PCF8563) += rtc-pcf8563.o + --- /dev/null 1970-01-01 00:00:00.000000000 +0000 -+++ linux-nslu2/drivers/rtc/interface.c 2006-01-09 03:39:33.000000000 +0100 ++++ linux-nslu2/drivers/rtc/interface.c 2006-01-20 21:26:14.000000000 +0100 @@ -0,0 +1,232 @@ +/* + * RTC subsystem, interface functions @@ -597,7 +637,7 @@ + +} --- /dev/null 1970-01-01 00:00:00.000000000 +0000 -+++ linux-nslu2/drivers/rtc/utils.c 2006-01-08 18:55:19.000000000 +0100 ++++ linux-nslu2/drivers/rtc/utils.c 2006-01-20 20:23:24.000000000 +0100 @@ -0,0 +1,97 @@ +/* + * RTC subsystem, utility functions @@ -696,8 +736,72 @@ + return 0; +} +EXPORT_SYMBOL(rtc_tm_to_time); ---- linux-nslu2.orig/arch/arm/Kconfig 2006-01-09 03:36:04.000000000 +0100 -+++ linux-nslu2/arch/arm/Kconfig 2006-01-09 03:39:50.000000000 +0100 +--- /dev/null 1970-01-01 00:00:00.000000000 +0000 ++++ linux-nslu2/drivers/rtc/hctosys.c 2006-01-20 20:23:24.000000000 +0100 +@@ -0,0 +1,61 @@ ++/* ++ * RTC subsystem, initialize system time on startup ++ * ++ * Copyright (C) 2005 Tower Technologies ++ * Author: Alessandro Zummo <a.zummo@towertech.it> ++ * ++ * This program is free software; you can redistribute it and/or modify ++ * it under the terms of the GNU General Public License as published by ++ * the Free Software Foundation; version 2 of the License. ++*/ ++ ++#include <linux/rtc.h> ++ ++/* IMPORTANT: the RTC only stores whole seconds. It is arbitrary ++ * whether it stores the most close value or the value with partial ++ * seconds truncated. However, it is important that we use it to store ++ * the truncated value. This is because otherwise it is necessary, ++ * in an rtc sync function, to read both xtime.tv_sec and ++ * xtime.tv_nsec. On some processors (i.e. ARM), an atomic read ++ * of >32bits is not possible. So storing the most close value would ++ * slow down the sync API. So here we have the truncated value and ++ * the best guess is to add 0.5s. ++ */ ++ ++static int __init rtc_hctosys(void) ++{ ++ int err; ++ struct class_device *class_dev = rtc_open(CONFIG_RTC_HCTOSYS_DEVICE); ++ ++ if (class_dev) { ++ struct rtc_time tm; ++ ++ if ((err = rtc_read_time(class_dev, &tm)) == 0) { ++ struct timespec tv; ++ ++ tv.tv_nsec = NSEC_PER_SEC >> 1; ++ ++ rtc_tm_to_time(&tm, &tv.tv_sec); ++ ++ do_settimeofday(&tv); ++ ++ dev_info(class_dev->dev, ++ "setting the system clock to " ++ "%d-%02d-%02d %02d:%02d:%02d (%d)\n", ++ tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday, ++ tm.tm_hour, tm.tm_min, tm.tm_sec, tv.tv_sec); ++ } ++ else ++ dev_err(class_dev->dev, ++ "unable to set the system clock\n"); ++ ++ rtc_close(class_dev); ++ } ++ else ++ printk("%s: unable to open rtc device (%s)\n", ++ __FILE__, CONFIG_RTC_HCTOSYS_DEVICE); ++ ++ return 0; ++} ++ ++late_initcall(rtc_hctosys); +--- linux-nslu2.orig/arch/arm/Kconfig 2006-01-20 21:25:46.000000000 +0100 ++++ linux-nslu2/arch/arm/Kconfig 2006-01-20 21:26:12.000000000 +0100 @@ -748,6 +748,8 @@ source "drivers/usb/Kconfig" source "drivers/mmc/Kconfig" @@ -707,8 +811,8 @@ endmenu source "fs/Kconfig" ---- linux-nslu2.orig/arch/arm/common/rtctime.c 2006-01-09 03:36:04.000000000 +0100 -+++ linux-nslu2/arch/arm/common/rtctime.c 2006-01-09 03:39:50.000000000 +0100 +--- linux-nslu2.orig/arch/arm/common/rtctime.c 2006-01-20 21:25:46.000000000 +0100 ++++ linux-nslu2/arch/arm/common/rtctime.c 2006-01-20 21:26:12.000000000 +0100 @@ -40,89 +40,6 @@ static struct rtc_ops *rtc_ops; #define rtc_epoch 1900UL @@ -879,6 +983,24 @@ if (ret) break; ret = copy_to_user(uarg, &alrm, sizeof(alrm)); +@@ -351,7 +268,7 @@ static int rtc_ioctl(struct inode *inode + return ret; + } + +-static int rtc_open(struct inode *inode, struct file *file) ++static int rtc_arm_open(struct inode *inode, struct file *file) + { + int ret; + +@@ -406,7 +323,7 @@ static struct file_operations rtc_fops = + .read = rtc_read, + .poll = rtc_poll, + .ioctl = rtc_ioctl, +- .open = rtc_open, ++ .open = rtc_arm_open, + .release = rtc_release, + .fasync = rtc_fasync, + }; @@ -425,7 +342,7 @@ static int rtc_read_proc(char *page, cha struct rtc_time tm; char *p = page; @@ -897,8 +1019,8 @@ p += sprintf(p, "alrm_time\t: "); if ((unsigned int)alrm.time.tm_hour <= 24) p += sprintf(p, "%02d:", alrm.time.tm_hour); ---- linux-nslu2.orig/include/asm-arm/rtc.h 2006-01-09 03:36:04.000000000 +0100 -+++ linux-nslu2/include/asm-arm/rtc.h 2006-01-09 03:39:50.000000000 +0100 +--- linux-nslu2.orig/include/asm-arm/rtc.h 2006-01-20 21:25:46.000000000 +0100 ++++ linux-nslu2/include/asm-arm/rtc.h 2006-01-20 21:26:12.000000000 +0100 @@ -25,9 +25,6 @@ struct rtc_ops { int (*proc)(char *buf); }; @@ -910,7 +1032,7 @@ void rtc_update(unsigned long, unsigned long); int register_rtc(struct rtc_ops *); --- /dev/null 1970-01-01 00:00:00.000000000 +0000 -+++ linux-nslu2/drivers/rtc/rtc-sysfs.c 2006-01-09 03:39:50.000000000 +0100 ++++ linux-nslu2/drivers/rtc/rtc-sysfs.c 2006-01-20 21:26:12.000000000 +0100 @@ -0,0 +1,128 @@ +/* + * RTC subsystem, sysfs interface @@ -1041,7 +1163,7 @@ +MODULE_DESCRIPTION("RTC class sysfs interface"); +MODULE_LICENSE("GPL"); --- /dev/null 1970-01-01 00:00:00.000000000 +0000 -+++ linux-nslu2/drivers/rtc/rtc-proc.c 2006-01-09 03:39:50.000000000 +0100 ++++ linux-nslu2/drivers/rtc/rtc-proc.c 2006-01-20 21:26:12.000000000 +0100 @@ -0,0 +1,158 @@ +/* + * RTC subsystem, proc interface @@ -1202,7 +1324,7 @@ +MODULE_DESCRIPTION("RTC class proc interface"); +MODULE_LICENSE("GPL"); --- /dev/null 1970-01-01 00:00:00.000000000 +0000 -+++ linux-nslu2/drivers/rtc/rtc-dev.c 2006-01-09 04:00:16.000000000 +0100 ++++ linux-nslu2/drivers/rtc/rtc-dev.c 2006-01-20 21:26:12.000000000 +0100 @@ -0,0 +1,372 @@ +/* + * RTC subsystem, dev interface @@ -1577,8 +1699,8 @@ +MODULE_DESCRIPTION("RTC class dev interface"); +MODULE_LICENSE("GPL"); --- /dev/null 1970-01-01 00:00:00.000000000 +0000 -+++ linux-nslu2/drivers/rtc/rtc-x1205.c 2006-01-09 04:17:02.000000000 +0100 -@@ -0,0 +1,725 @@ ++++ linux-nslu2/drivers/rtc/rtc-x1205.c 2006-01-20 21:26:12.000000000 +0100 +@@ -0,0 +1,672 @@ +/* + * An i2c driver for the Xicor/Intersil X1205 RTC + * Copyright 2004 Karen Spearel @@ -1620,8 +1742,6 @@ + +/* Insmod parameters */ +I2C_CLIENT_INSMOD; -+I2C_CLIENT_MODULE_PARM(hctosys, -+ "Set the system time from the hardware clock upon initialization"); + +/* offsets into CCR area */ + @@ -1918,50 +2038,6 @@ + return 0; +} + -+static int x1205_hctosys(struct i2c_client *client) -+{ -+ int err; -+ -+ struct rtc_time tm; -+ struct timespec tv; -+ unsigned char sr; -+ -+ if ((err = x1205_get_status(client, &sr)) < 0) -+ return err; -+ -+ /* Don't set if we had a power failure */ -+ if (sr & X1205_SR_RTCF) -+ return -EINVAL; -+ -+ if ((err = x1205_get_datetime(client, &tm, X1205_CCR_BASE)) < 0) -+ return err; -+ -+ /* IMPORTANT: the RTC only stores whole seconds. It is arbitrary -+ * whether it stores the most close value or the value with partial -+ * seconds truncated. However, it is important that we use it to store -+ * the truncated value. This is because otherwise it is necessary, -+ * in an rtc sync function, to read both xtime.tv_sec and -+ * xtime.tv_nsec. On some processors (i.e. ARM), an atomic read -+ * of >32bits is not possible. So storing the most close value would -+ * slow down the sync API. So here we have the truncated value and -+ * the best guess is to add 0.5s. -+ */ -+ -+ tv.tv_nsec = NSEC_PER_SEC >> 1; -+ -+ rtc_tm_to_time(&tm, &tv.tv_sec); -+ -+ do_settimeofday(&tv); -+ -+ dev_info(&client->dev, -+ "setting the system clock to %02d-%02d-%d %02d:%02d:%02d\n", -+ tm.tm_year + 1900, tm.tm_mon + 1, -+ tm.tm_mday, tm.tm_hour, tm.tm_min, -+ tm.tm_sec); -+ -+ return 0; -+} -+ +struct x1205_limit +{ + unsigned char reg; @@ -2245,13 +2321,6 @@ + else + dev_err(&client->dev, "couldn't read status\n"); + -+ /* If requested, set the system time */ -+ if (hctosys) { -+ if ((err = x1205_hctosys(client)) < 0) -+ dev_err(&client->dev, -+ "unable to set the system clock\n"); -+ } -+ + device_create_file(&client->dev, &dev_attr_atrim); + device_create_file(&client->dev, &dev_attr_dtrim); + @@ -2305,7 +2374,7 @@ +module_init(x1205_init); +module_exit(x1205_exit); --- /dev/null 1970-01-01 00:00:00.000000000 +0000 -+++ linux-nslu2/drivers/rtc/rtc-test.c 2006-01-09 04:17:02.000000000 +0100 ++++ linux-nslu2/drivers/rtc/rtc-test.c 2006-01-20 21:26:12.000000000 +0100 @@ -0,0 +1,206 @@ +/* + * An RTC test device/driver @@ -2514,8 +2583,8 @@ +module_init(test_init); +module_exit(test_exit); --- /dev/null 1970-01-01 00:00:00.000000000 +0000 -+++ linux-nslu2/drivers/rtc/rtc-ds1672.c 2006-01-12 00:31:05.000000000 +0100 -@@ -0,0 +1,278 @@ ++++ linux-nslu2/drivers/rtc/rtc-ds1672.c 2006-01-20 21:26:12.000000000 +0100 +@@ -0,0 +1,234 @@ +/* + * An rtc/i2c driver for the Dallas DS1672 + * Copyright 2005 Alessandro Zummo @@ -2537,8 +2606,6 @@ + +/* Insmod parameters */ +I2C_CLIENT_INSMOD; -+I2C_CLIENT_MODULE_PARM(hctosys, -+ "Set the system time from the hardware clock upon initialization"); + +/* Registers */ + @@ -2626,41 +2693,6 @@ + return ds1672_set_mmss(client, secs); +} + -+static int ds1672_hctosys(struct i2c_client *client) -+{ -+ int err; -+ struct rtc_time tm; -+ struct timespec tv; -+ -+ if ((err = ds1672_get_datetime(client, &tm)) != 0) -+ return err; -+ -+ /* IMPORTANT: the RTC only stores whole seconds. It is arbitrary -+ * whether it stores the most close value or the value with partial -+ * seconds truncated. However, it is important that we use it to store -+ * the truncated value. This is because otherwise it is necessary, -+ * in an rtc sync function, to read both xtime.tv_sec and -+ * xtime.tv_nsec. On some processors (i.e. ARM), an atomic read -+ * of >32bits is not possible. So storing the most close value would -+ * slow down the sync API. So here we have the truncated value and -+ * the best guess is to add 0.5s. -+ */ -+ -+ tv.tv_nsec = NSEC_PER_SEC >> 1; -+ -+ rtc_tm_to_time(&tm, &tv.tv_sec); -+ -+ do_settimeofday(&tv); -+ -+ dev_info(&client->dev, -+ "setting the system clock to %d-%02d-%02d %02d:%02d:%02d\n", -+ tm.tm_year + 1900, tm.tm_mon + 1, -+ tm.tm_mday, tm.tm_hour, tm.tm_min, -+ tm.tm_sec); -+ -+ return 0; -+} -+ +static int ds1672_rtc_read_time(struct device *dev, struct rtc_time *tm) +{ + return ds1672_get_datetime(to_i2c_client(dev), tm); @@ -2758,13 +2790,6 @@ + + i2c_set_clientdata(client, rtc); + -+ /* If requested, set the system time */ -+ if (hctosys) { -+ if ((err = ds1672_hctosys(client)) < 0) -+ dev_err(&client->dev, -+ "unable to set the system clock\n"); -+ } -+ + return 0; + +exit_detach: @@ -2794,3 +2819,390 @@ + +module_init(ds1672_init); +module_exit(ds1672_exit); +--- /dev/null 1970-01-01 00:00:00.000000000 +0000 ++++ linux-nslu2/drivers/rtc/rtc-pcf8563.c 2006-01-20 21:27:41.000000000 +0100 +@@ -0,0 +1,384 @@ ++/* ++ * An I2C driver for the Philips PCF8563 RTC ++ * Copyright 2005-06 Tower Technologies ++ * ++ * Author: Alessandro Zummo <a.zummo@towertech.it> ++ * Maintainers: http://www.nslu2-linux.org/ ++ * ++ * based on the other drivers in this same directory. ++ * ++ * http://www.semiconductors.philips.com/acrobat/datasheets/PCF8563-04.pdf ++ * ++ * This program is free software; you can redistribute it and/or modify ++ * it under the terms of the GNU General Public License as published by ++ * the Free Software Foundation; either version 2 of the License, or ++ * (at your option) any later version. ++ */ ++ ++#include <linux/module.h> ++#include <linux/i2c.h> ++#include <linux/bcd.h> ++#include <linux/rtc.h> ++ ++#define DRV_VERSION "0.4.0" ++ ++/* Addresses to scan */ ++static unsigned short normal_i2c[] = { 0x51, I2C_CLIENT_END }; ++ ++/* Module parameters */ ++I2C_CLIENT_INSMOD; ++ ++#define PCF8563_REG_ST1 0x00 /* status */ ++#define PCF8563_REG_ST2 0x01 ++ ++#define PCF8563_REG_SC 0x02 /* datetime */ ++#define PCF8563_REG_MN 0x03 ++#define PCF8563_REG_HR 0x04 ++#define PCF8563_REG_DM 0x05 ++#define PCF8563_REG_DW 0x06 ++#define PCF8563_REG_MO 0x07 ++#define PCF8563_REG_YR 0x08 ++ ++#define PCF8563_REG_AMN 0x09 /* alarm */ ++#define PCF8563_REG_AHR 0x0A ++#define PCF8563_REG_ADM 0x0B ++#define PCF8563_REG_ADW 0x0C ++ ++#define PCF8563_REG_CLKO 0x0D /* clock out */ ++#define PCF8563_REG_TMRC 0x0E /* timer control */ ++#define PCF8563_REG_TMR 0x0F /* timer */ ++ ++#define PCF8563_SC_LV 0x80 /* low voltage */ ++#define PCF8563_MO_C 0x80 /* century */ ++ ++/* Prototypes */ ++static int pcf8563_attach(struct i2c_adapter *adapter); ++static int pcf8563_detach(struct i2c_client *client); ++static int pcf8563_probe(struct i2c_adapter *adapter, int address, int kind); ++ ++static struct i2c_driver pcf8563_driver = { ++ .owner = THIS_MODULE, ++ .name = "pcf8563", ++ .flags = I2C_DF_NOTIFY, ++ .attach_adapter = &pcf8563_attach, ++ .detach_client = &pcf8563_detach, ++}; ++ ++/* ++ * In the routines that deal directly with the pcf8563 hardware, we use ++ * rtc_time -- month 0-11, hour 0-23, yr = calendar year-epoch. ++ */ ++static int pcf8563_get_datetime(struct i2c_client *client, struct rtc_time *tm) ++{ ++ unsigned char buf[13]; ++ unsigned char addr = PCF8563_REG_ST1; ++ ++ struct i2c_msg msgs[] = { ++ { client->addr, 0, 1, &addr }, /* setup read ptr */ ++ { client->addr, I2C_M_RD, 13, buf }, /* read status + date */ ++ }; ++ ++ /* read registers */ ++ if ((i2c_transfer(client->adapter, msgs, 2)) != 2) { ++ dev_err(&client->dev, "%s: read error\n", __FUNCTION__); ++ return -EIO; ++ } ++ ++ if (buf[PCF8563_REG_SC] & PCF8563_SC_LV) ++ dev_info(&client->dev, ++ "low voltage detected, date/time is not reliable.\n"); ++ ++ dev_dbg(&client->dev, ++ "%s: raw data is st1=%02x, st2=%02x, sec=%02x, min=%02x, hr=%02x, " ++ "mday=%02x, wday=%02x, mon=%02x, year=%02x\n", ++ __FUNCTION__, ++ buf[0], buf[1], buf[2], buf[3], ++ buf[4], buf[5], buf[6], buf[7], ++ buf[8]); ++ ++ ++ tm->tm_sec = BCD2BIN(buf[PCF8563_REG_SC] & 0x7F); ++ tm->tm_min = BCD2BIN(buf[PCF8563_REG_MN] & 0x7F); ++ tm->tm_hour = BCD2BIN(buf[PCF8563_REG_HR] & 0x3F); /* rtc hr 0-23 */ ++ tm->tm_mday = BCD2BIN(buf[PCF8563_REG_DM] & 0x3F); ++ tm->tm_wday = buf[PCF8563_REG_DW] & 0x07; ++ tm->tm_mon = BCD2BIN(buf[PCF8563_REG_MO] & 0x1F) - 1; /* rtc mn 1-12 */ ++ tm->tm_year = BCD2BIN(buf[PCF8563_REG_YR]) ++ + (buf[PCF8563_REG_MO] & PCF8563_MO_C ? 100 : 0); ++ ++ dev_dbg(&client->dev, "%s: tm is secs=%d, mins=%d, hours=%d, " ++ "mday=%d, mon=%d, year=%d, wday=%d\n", ++ __FUNCTION__, ++ tm->tm_sec, tm->tm_min, tm->tm_hour, ++ tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday); ++ ++ /* the clock can give out invalid datetime, but we cannot return ++ * -EINVAL otherwise hwclock will refuse to set the time on bootup. ++ */ ++ if (rtc_valid_tm(tm) < 0) ++ dev_err(&client->dev, "retrieved date/time is not valid.\n"); ++ ++ return 0; ++} ++ ++static int pcf8563_set_datetime(struct i2c_client *client, struct rtc_time *tm) ++{ ++ int i, err; ++ unsigned char buf[9]; ++ ++ dev_dbg(&client->dev, "%s: secs=%d, mins=%d, hours=%d, " ++ "mday=%d, mon=%d, year=%d, wday=%d\n", ++ __FUNCTION__, ++ tm->tm_sec, tm->tm_min, tm->tm_hour, ++ tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday); ++ ++ /* hours, minutes and seconds */ ++ buf[PCF8563_REG_SC] = BIN2BCD(tm->tm_sec); ++ buf[PCF8563_REG_MN] = BIN2BCD(tm->tm_min); ++ buf[PCF8563_REG_HR] = BIN2BCD(tm->tm_hour); ++ ++ buf[PCF8563_REG_DM] = BIN2BCD(tm->tm_mday); ++ ++ /* month, 1 - 12 */ ++ buf[PCF8563_REG_MO] = BIN2BCD(tm->tm_mon + 1); ++ ++ /* year and century */ ++ buf[PCF8563_REG_YR] = BIN2BCD(tm->tm_year % 100); ++ if (tm->tm_year / 100) ++ buf[PCF8563_REG_MO] |= PCF8563_MO_C; ++ ++ buf[PCF8563_REG_DW] = tm->tm_wday & 0x07; ++ ++ /* write register's data */ ++ for (i = 0; i < 7; i++) { ++ unsigned char data[2] = { PCF8563_REG_SC + i, ++ buf[PCF8563_REG_SC + i] }; ++ ++ err = i2c_master_send(client, data, sizeof(data)); ++ if (err != sizeof(data)) { ++ dev_err(&client->dev, ++ "%s: err=%d addr=%02x, data=%02x\n", ++ __FUNCTION__, err, data[0], data[1]); ++ return -EIO; ++ } ++ }; ++ ++ return 0; ++} ++ ++struct pcf8563_limit ++{ ++ unsigned char reg; ++ unsigned char mask; ++ unsigned char min; ++ unsigned char max; ++}; ++ ++static int pcf8563_validate_client(struct i2c_client *client) ++{ ++ int i, xfer; ++ ++ static const struct pcf8563_limit probe_limits_pattern[] = { ++ /* register, mask, min, max */ ++ { PCF8563_REG_SC, 0x7F, 0, 59 }, ++ { PCF8563_REG_MN, 0x7F, 0, 59 }, ++ { PCF8563_REG_HR, 0x3F, 0, 23 }, ++ { PCF8563_REG_DM, 0x3F, 0, 31 }, ++ { PCF8563_REG_MO, 0x1F, 0, 12 }, ++ { PCF8563_REG_YR, 0xFF, 0, 99 }, ++ }; ++ ++ /* check limits (only registers with bcd values) */ ++ for (i = 0; i < ARRAY_SIZE(probe_limits_pattern); i++) { ++ unsigned char addr, buf, value; ++ ++ addr = probe_limits_pattern[i].reg; ++ ++ struct i2c_msg msgs[2] = { ++ { client->addr, 0, 2, &addr }, ++ { client->addr, I2C_M_RD, 1, &buf }, ++ }; ++ ++ xfer = i2c_transfer(client->adapter, msgs, 2); ++ ++ if (xfer != 2) { ++ dev_err(&client->adapter->dev, ++ "%s: could not read register %x\n", ++ __FUNCTION__, probe_limits_pattern[i].reg); ++ ++ return -EIO; ++ } ++ ++ value = BCD2BIN(buf & probe_limits_pattern[i].mask); ++ ++ if (value > probe_limits_pattern[i].max || ++ value < probe_limits_pattern[i].min) { ++ dev_dbg(&client->adapter->dev, ++ "%s: register=%x, lim pattern=%d, value=%d\n", ++ __FUNCTION__, probe_limits_pattern[i].reg, i, value); ++ ++ return -ENODEV; ++ } ++ } ++ ++ return 0; ++} ++ ++static int pcf8563_rtc_read_time(struct device *dev, ++ struct rtc_time *tm) ++{ ++ return pcf8563_get_datetime(to_i2c_client(dev), tm); ++} ++ ++static int pcf8563_rtc_set_time(struct device *dev, ++ struct rtc_time *tm) ++{ ++ return pcf8563_set_datetime(to_i2c_client(dev), tm); ++} ++ ++static int pcf8563_rtc_set_mmss(struct device *dev, unsigned long secs) ++{ ++ int err; ++ ++ struct rtc_time new_tm, old_tm; ++ ++ if ((err = pcf8563_rtc_read_time(dev, &old_tm) == 0)) ++ return err; ++ ++ /* FIXME xtime.tv_nsec = old_tm.tm_sec * 10000000; */ ++ new_tm.tm_sec = secs % 60; ++ secs /= 60; ++ new_tm.tm_min = secs % 60; ++ secs /= 60; ++ new_tm.tm_hour = secs % 24; ++ ++ /* ++ * avoid writing when we're going to change the day ++ * of the month. We will retry in the next minute. ++ * This basically means that if the RTC must not drift ++ * by more than 1 minute in 11 minutes. ++ */ ++ if ((old_tm.tm_hour == 23 && old_tm.tm_min == 59) || ++ (new_tm.tm_hour == 23 && new_tm.tm_min == 59)) ++ return 1; ++ ++ return pcf8563_rtc_set_time(dev, &new_tm); ++} ++ ++static int pcf8563_rtc_proc(struct device *dev, struct seq_file *seq) ++{ ++ seq_printf(seq, "24hr\t\t: yes\n"); ++ return 0; ++} ++ ++static struct rtc_class_ops pcf8563_rtc_ops = { ++ .proc = pcf8563_rtc_proc, ++ .read_time = pcf8563_rtc_read_time, ++ .set_time = pcf8563_rtc_set_time, ++ .set_mmss = pcf8563_rtc_set_mmss, ++}; ++ ++static int pcf8563_attach(struct i2c_adapter *adapter) ++{ ++ return i2c_probe(adapter, &addr_data, pcf8563_probe); ++} ++ ++static int pcf8563_probe(struct i2c_adapter *adapter, int address, int kind) ++{ ++ struct i2c_client *client; ++ struct rtc_device *rtc; ++ ++ int err = 0; ++ ++ dev_dbg(&adapter->dev, "%s\n", __FUNCTION__); ++ ++ if (!i2c_check_functionality(adapter, I2C_FUNC_I2C)) { ++ err = -ENODEV; ++ goto exit; ++ } ++ ++ if (!(client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL))) { ++ err = -ENOMEM; ++ goto exit; ++ } ++ ++ client->addr = address; ++ client->driver = &pcf8563_driver; ++ client->adapter = adapter; ++ ++ strlcpy(client->name, pcf8563_driver.name, I2C_NAME_SIZE); ++ ++ /* Verify the chip is really an PCF8563 */ ++ if (kind < 0) { ++ if (pcf8563_validate_client(client) < 0) { ++ err = -ENODEV; ++ goto exit_kfree; ++ } ++ } ++ ++ /* Inform the i2c layer */ ++ if ((err = i2c_attach_client(client))) ++ goto exit_kfree; ++ ++ dev_info(&client->dev, "chip found, driver version " DRV_VERSION "\n"); ++ ++ rtc = rtc_device_register(pcf8563_driver.name, &client->dev, ++ &pcf8563_rtc_ops, THIS_MODULE); ++ ++ if (IS_ERR(rtc)) { ++ err = PTR_ERR(rtc); ++ dev_err(&client->dev, ++ "unable to register the class device\n"); ++ goto exit_detach; ++ } ++ ++ i2c_set_clientdata(client, rtc); ++ ++ return 0; ++ ++exit_detach: ++ i2c_detach_client(client); ++ ++exit_kfree: ++ kfree(client); ++ ++exit: ++ return err; ++} ++ ++static int pcf8563_detach(struct i2c_client *client) ++{ ++ int err; ++ struct rtc_device *rtc = i2c_get_clientdata(client); ++ ++ dev_dbg(&client->dev, "%s\n", __FUNCTION__); ++ ++ if (rtc) ++ rtc_device_unregister(rtc); ++ ++ if ((err = i2c_detach_client(client))) ++ return err; ++ ++ kfree(client); ++ ++ return 0; ++} ++ ++static int __init pcf8563_init(void) ++{ ++ return i2c_add_driver(&pcf8563_driver); ++} ++ ++static void __exit pcf8563_exit(void) ++{ ++ i2c_del_driver(&pcf8563_driver); ++} ++ ++MODULE_AUTHOR("Alessandro Zummo <a.zummo@towertech.it>"); ++MODULE_DESCRIPTION("Philips PCF8563/Epson RTC8564 RTC driver"); ++MODULE_LICENSE("GPL"); ++MODULE_VERSION(DRV_VERSION); ++ ++module_init(pcf8563_init); ++module_exit(pcf8563_exit); ++ |